Question

$(9x - 8y) {2}$
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Answer 1

$\huge\mathcal\pink{Hey!}$

${(9x - 8y)}^{2} \\ {81x}^{2} + {64y}^{2} - 2 \times 9x \times 8y \\ {81x}^{2} + {64y}^{2} -144xy$